Cream duvet cover with turquoise piping, queen size

I lost my cream duvet cover with turquoise piping from the MiloHome bedding set, queen size. It's Egyptian cotton, around 230x260 cm, with a small coffee stain on the bottom right corner and a tiny snag near the zipper, plus a subtle embroidered initials 'EP' in the corner. I last had it yesterday around 3pm outside the Acropolis Museum on Dionysiou Areopagou street in Athens; I was loading a bag and must have left it there. This duvet cover has sentimental value—it was a gift from my mother, and I’m really hoping to get it back. If anyone found it, I’d be forever grateful and can meet near Syntagma to pick it up.